Latibulus is a genus of wasps in the family Ichneumonidae.
There are two species in Europe:[1] Latibulus argiolus is a parasitoid which lies in wait in the near proximity of a Polistes paper wasp nest waiting for an opportunity for penetration and then, within a few seconds, lays an egg into a nest cell.
The first emerges in the summer after pupation takes place in a yellowish cocoon within the cell; the second generation winters in a brown, resistant cocoon.
The pupa of the second generation is able to break through the cell cover by making jerky movements.
The pupa falls to the ground, looks for a recess by making rolling movements, and winters there.